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This study evaluates the effect of varying stress cycles of moisture induced stress tester (MIST) on structural parameters of asphalt mixes containing recycled asphalt pavement (RAP). Five levels of stress cycles were adopted viz. 1000, 2000, 3500, 5000 and 10,000. Bulk specific gravity tests ( Gmb ) were then conducted on asphalt mixes. The evaluated parameters included percent change in total air voids (pTAV), connected air voids (CAV), degree of saturation ( S ), percent density change (%DC) and swelling index (SI). The results indicated that pTAV, CAV,S, %DC, and SI increased with the increase in stress cycles. However, the inclusion of RAP was observed to decrease such parameters. ‘Good’ to ‘Excellent’ correlation existed between common parameter pTAV and CAV,  S , %DC, SI. It is expected that the current study will assist in explaining how MIST conditioning affects the moisture damage susceptibility of asphalt mixes based on performance tests.

Contribution of MIST conditioning in evolution of structural parameters of asphalt mixes containing recycled asphalt pavement